[PATCH net] cls_matchall: fix tcf_unbind_filter missing

[Hangbin Liu]

Fix tcf_unbind_filter missing in cls_matchall as this will trigger
WARN_ON() in cbq_destroy_class().

Fixes: fd62d9f5c575f ("net/sched: matchall: Fix configuration race")
Reported-by: Li Shuang <shu...@redhat.com>
Signed-off-by: Hangbin Liu <liuhang...@gmail.com>
---
 net/sched/cls_matchall.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c
index 47b207e..7ad65da 100644
--- a/net/sched/cls_matchall.c
+++ b/net/sched/cls_matchall.c
@@ -111,6 +111,8 @@ static void mall_destroy(struct tcf_proto *tp, struct 
netlink_ext_ack *extack)
        if (!head)
                return;
 
+       tcf_unbind_filter(tp, &head->res);
+
        if (!tc_skip_hw(head->flags))
                mall_destroy_hw_filter(tp, head, (unsigned long) head, extack);
 
-- 
2.5.5